See your eye doctor: For your symptoms of floaters you should see your eye doctor right away to see if it's the sign of a serious problem. As for your other symptoms, they should warrant some further testing.
I believe that it is correct to say that RNA is not replicated, but reproduced. DNA, what I know currently, is the only one that replicates itself.   Plus, to my knowledge, you don't need to copy a RNA strand.
Well, neither I'm sorry to say. During DNA replication both strands of the DNA are reproduced, so D is out as an answer. Yes, a complementary strand of DNA is reproduced, but this answer suggests that only one strand of DNA is made when in fact two strands of DNA are made.